Process of extracting turpentine and rosin from wood.



J. H. GASTONA.

PROCESS OF EXTRAGTING TURPENTINE AND ROSIN FROM WOOD.

APPLICATION FILED 0018,1912,

1,1. 1 1,644. Patented Sept. 22, 1914.

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I 3/? E 4 0 24 z k 3 anuentoz HM imam JOHN H. CASTONA, OF GULFPORT, MISSISSIPPI.

PROCESS OF EXTRACTING TURPENTINE AND BOSIN FROM WOOD.

Application filed October 8, 1912. Serial No. 724,631.

To all whom it may concern-.-

Qisposed within the extractor is Be it known that I, Jon H. CAs'roN'A, a citizen of the .United States, residingat Gulfport, in the county of Harrison and SL'ltG of Mississippi, have invented new and useful Improvements in Processes of EX tracting Turpentine and Rosin from food, of which the following is a specification.

' This invention relates to a process of extracting. turpentine and rosin from wood, the primary object of the inventionbeing to provide a process whereby the turpentine may be used as a solvent for the extraction of the rosin, thus obviating the objections 1'0 the use of hydro-carbons and other foreign substances i 1 A further object of theinventionis to provide a process of extracting'turpentine and rosin, \rhcrebv high grade products may be obtained at'a minimum cost.

The accompanying drawing shows a sectional elevation of one form otapparatus which may be employed for carrying-the process into practical efi'e'ct. V

In the drawing, 1 designates an extractor having suitably closed inlet 2 for the'introduction of the coinminuted fwo o'd'and a suitably closed outlet 3f01 the witlulraxval of the refuse wood at the completion ofthe' extracting operation. This extractor-is provided with a heating chamber 4 in, its base and a rosin collection smce or 'chamber' 5 above said heating chain er. A i a perforated cage or basket (3 to contain there-barge of comminuted wood, saidcage or basket terminating above the chamber 5'and being arranged in spaced relation to the extractor to provide a surrounding space 7 for the dis-' charge of the volatile products. 'Communh catin at'its lower end with the heating chem er 4 is a perforated pipe S'extending centrally ,within the cage, whereby steam may be introduced for c'irculation'throughout the mass of-Wood to heat the saine'for the separation of the volatile products therefrom. Apvalve 9 liavingan eXteriorly pro-" 'jecting stem 10 is provided for controlling the supply-of steam-to said pipe 8 from the chamber t. p l p 1 The chamber. his. supplied. with steam through a pipe 11-' having a valve 12 from-a boiler or steam generator 13 and apipe 14 having a controlling valve-'15 is provided'fot the discharge-of the water of-condensation.

' frornthe chamber 4 and to regulate the dis- Specificatioii of Letters Patent.

Patented Sept. 22,191 11 turpentine, and has leading therefrom a pipe 23 provided with acontrollingvalve 24.

.This pipe 223 communicates with a-heating coil arran ed in the chamber 4, which coil 1s connected by a pipe 26'having a controll-ing valve 27 with a perforatedsolvent in-; ection-coil or spray coil 28 located in'the" top of the c'ag,e-6. v I 1 v Arranged below the level ofthe extractor. is a still 29 provided in its "bottom with aheating'chamber 30 connectedwith-the' pipe '14 and provided with .a valved drain pipe .31 for the"dis charge of .water of condensation therefrom. The f still communicates with the vapor discharge pipe1b', at apoint,

between the valve 1 7 and thecondenserlfi, through a vapor return pipe 32 having a controlling valve 33, whereby the turpentine V passing with the rosin to the still and separatedtherefrom 'may be returned to the condenser 18 and condensed therein;

The collection chamber 5 is'incdmmunicw tion with the still 29 through a rosin dis charge pipefla having controlling valve throu'glrwlnch the resin, watero'f con- 'densation from. the steam .and turpentine contained therewith are. drawn of? from the extractor into .the still, the rosin. being v v tion of.the water of condensation from the .finally discharged from thei'still into a suitable receptacle 36 through -a valved out;

let 37. A perforatmhsteam injector pipe or coil 38 is arrangedwithiii' the stillf'and' connects \viththe pipe let'andisj irovided. with a. controlling valve 39. Front the tank 20 leads a pipe 40 connnunicating'witli a."turpentine receiving tank 41 and having a controlling valve 42. a g

The apparatus 'hav described mode of carrying niy im proved procepra-ctical efl'ect' "is as fiillowsziThe i 12 and 15 are first opened and steam sl-J r plied to the chambers 4 and 30 to maintain thesame -at a desired temperature. The valves 24 and are then opened and turpentine permitted to flow from the tank 20 to the spray coil or injector 28. In its flow through the coil 25, the turpentine is heated to a moderate degree, so that as it discharges from the coil 28 and percolates downward through the body of comminuted wood in the cage 6 it will dissolve and leach out the rosin and flow into the collection chamber 5. lVhen the turpentine employed as a solvent has dissolved the rosin, the valve 35 is opened for the discharge of the rosin and turpentine contained therewith, into the still 29, and simultaneously the valve 39 is ipencd for the supply of steam through the injector 38 into the still. The turpentine in the still is thereby heated and converted into vapor, whereupon the valve 33 is opened for 'ts flow to the condenser 18,. in which it is iquefied, the turpentine flowing from the condenser back to the tank 90. As soon as the major portion of the rosin is extracted from the Wood, the valve 9 is opened andsteam permitted to pass through the perforated pipe 8 throughout the mass of the wood, whereby the turpentine and the remainder of the rosin contained therein are liberated, and the valve 17 is opened to permit How of the turpentine vapors and steam to the condenser 18, from which the turpentine and water of condensation pass to the tank 20, the Water being Withdrawn through the pipe 21, while the additional turpentine extracted is discharged from the tank 20 through the pipe 40 to the turpentine receiving tank 41. A fter the volatile constituents are all extracted from the wood, the valves 9 and 17 are closed, the remainder of the rosin with the water of condensation contained therewith discharged into the still 29 and the valve 35 closed, and the extractor then emptied of the refuse wood and refilled for subsequent use.

It will be understood from the foregoing description that the chamber 4 heated by steam from the boiler or steam generator, maintains an even temperature in the bottom of the extractor and supplements the heating action of the steam discharged through the pipe 8, maintains the rosin in the chamber 5 in a liquefied condition for free discharge, and at the same time heats the coil 25 so that the solvent turpentine supplied to the injector 28 may be raised to a temperature high enough to adapt it to.

rapidly extract and discharge the turpentine. It will also be seen that as the turpentine and vapors are permitted to have ready discharge, while thepnass of wood is heated throughout, condensation of the steam in the wood 15 retarded and to a large extent prevented, thus enabling the products to be obtained at alow temperatureand without the separation of any of the. lighter elements of the turpentine into uncondensable gases. A high grade and a greater quantity of turpentine may, therefore, be obtained from a given quantity of wood than is possible by the use f any of the ordinary processes in which i is necessary to employ steam the di charge of the vapors are in any manner r arded. By the use of turpentine as a solvent for the rosin, a natural-v solvent is employed which may be readily separated from the turpentine vapors without in any manner impairing the quality of the turpentine, as is the case in the use of hydrocarbons and other volatile solvents, the constant use of the turpentine as a solvent or leaching agent on the contrarv increasing its purity. As turpentine is the natural solvent of rosin, its use in large quantities is not necessary, and as it is contained at a low temperature in the tank 20 and is heated only to a moderate degree in the coil 25, no loss of turpentine is occasioned, either through its partial conversion into vapor in the storage tank or the heating of its liberated volatile constituents until changed into uncondensable gases, as is common in the case where the turpentine solvent is heated in a large body in a tank prior to use. The process described also enables a large amount of turpentine and rosin to be extracted from a given amount of wood in a quick, convenient and economical manner. 7

\Vhile in the drawing only one extractor is shown, it will of coursefbe understood that in the process any suitable number of extractors may be employed. It will also be I understood that by eliminating the use of hydro-carbons and other foreign agents as solvents, contamination of the turpentine is avoided.

I claim 1. The herein described process of separating turpentine and rosin from wood, which consists in supporting a body of wood within a container in spaced relation to the sides and bottom of the container but in communication at all sides therewith, subjecting the wood to the leaching action of moderately heated turpentine allowed to percolate downwardly through the wood,

subjecting the bottom of the container and the solvent turpentine passing to the container for use to the action of externally under high heat and pressure, or in which applied heat, so as to evaporate the ex-' tracted volatile elements, moderately heat the solvent turpentine and keep the 'extracted rosin liquefied, collecting the rosin and turpentine in the bottom of the container, raising the temperature of the same in the bottom of the receptacle to a higher degree to vaporize a portion of the! turpentine and maintain the rosin in a liquefied condition,

separating the unvolatilized turpentine from the rosin for recovering, injecting steam internally at a low temperature an ressure throughout the mass of the wood or the vaporization of the remainin unextract'ed turpentine and the retained solvent, collecting the turpentine vapor and steam from the space between the body of wood and container and condensing the same, and collecting and separating the rosin, water of condensation and turpentine from the bottom of the container and condensin the resulting turpentine vapor.

2. T e herein described process of separating turpentine and rosin from Wood, which consists in first subjecting a body of wood to the leaching action of moderately heated turpentine, collecting the rosin and turpentine, raising the temperature of the same to vaporize a ortion of the turpentine and maintain tiie rosin in a liquefied condition, separating the unvolatilized turentine from the rosin for recovery, then injecting steam throughout the mass of the wood for the vaporization of the contained turpentine and solvent, and collecting and condensing the turpentine vapor and steam and separating the turpentine from the water of condensation.

3. The herein described process of separating turpentine and rosin from wood, which consists in first subjecting the wood to the leaching action of moderately warmed turpentine, collecting the rosin and turpen tine, raising the temperature of the same to vaporize a portion of the turpentine and maintain the rosin in a liquefied condition, discharging the unvolatilized turpentine and rosin and separating the same, con-- (lensing the turpentine and restoring it to the source of supply, discharging steam throughout the mass of the wood for the extraction of the remainder of the rosin, the turpentine contained therein and the residual solvent, and then collecting and condensing the turpentine and conveying it to said source of supply of the solvent and withdrawing the water of condensation therefrom.

4. The herein described process of separating turpentine and rosin from wood, which consists in subjecting the wood to the leaching action of turpentine drawn from a source of supply and moderately heated at a point between such source and its point of use, collecting the solvent turpentine and rosin, raising the temperature of the same to a point sufficiently high to vaporize a portion of the solvent and keep the rosin liquefied, separating the unvolutilized solvent from the rosin, condensing the turpentine and returning it to the source of supply. heating the mass of wood by injecting sieam at a low temperature and 1..l(isSUl6 throughout the same, collecting and condensing the turpentine vapors and steam, conveying the extracted turpentine to the said source of supply and discharging the Water of condensation, and Withdrawing from said source of supply the amount of turpentine gained during the extracting operation.

In testimony whereof I atlix my signature in presence of two witnesses.

JOHN H. CASTONA. Witnesses T. J. FAIRLEY, J. J. MCCLURE. 

